Power amplifier

USPTO Application #: 20080094142
Title: Power amplifier
Abstract: A power amplifier amplifies an input signal having a fundamental frequency of which band width ranges between a first fundamental frequency F1 and a second fundamental frequency F2. The power amplifier includes a power amplifier transistor for amplifying the input signal and an output matching circuit for suppressing a harmonic component included in an output signal from the power amplifier transistor. The output matching circuit includes: a first second-order harmonic series resonant circuit including a first inductor and a first capacitor and having a frequency twice as large as F1 as a resonance frequency; and a second second-order harmonic series resonant circuit including a second inductor and a second capacitor and having a frequency twice as large as F2 as a resonance frequency. (end of abstract)
Agent: Mcdermott Will & Emery LLP - Washington, DC, US
Inventors: Katsuhiko Kawashima, Masahiro Maeda, Masatoshi Kamitani
USPTO Applicaton #: 20080094142 - Class: 330296 (USPTO)

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